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(!!!!) 307A=VT-225 National Union NOS 1940's some glass chips inside tube flaked off from glass arbor (70ma)

$ 39.99

307A=VT-225 National Union NOS 1940's some glass chips inside tube flaked off from glass arbor

1 tube) 70ma Gm=5250

 

Good Ma range = 45-50ma

Gm Gm = 4000

 

(307A=VT-225 Sylvania / Ken-Rad, Identical to Western Electric, 6 Watt Pentode)
(The 307A is a 306A with a quick heating filament, 5.5V @ 1A filament,
5-pin bayonet socket with top cap)

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See more: vacuum tube
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